Patents by Inventor Kazuki Yamane
Kazuki Yamane has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11736054Abstract: There is provided a control device for an electric motor. The control device includes an inverter circuit and a control circuit. In a control cycle of the electric motor, the control cycle includes first to third sections. The control circuit outputs a first modulated wave in accordance with an output of the electric motor and outputs a minimum value or maximum value of a carrier wave as second and third modulated waves in the first section with a peak of first alternate-current voltage, and outputs the second modulated wave in accordance with an output of the electric motor and outputs the minimum value or maximum value of the carrier wave as the first and third modulated waves in the second section with a peak of second alternate-current voltage. The same output is applied in the third section with a peak of third alternate-current voltage.Type: GrantFiled: June 22, 2020Date of Patent: August 22, 2023Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuki Yamane, Nobuaki Yamada, Masamichi Nawa
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Publication number: 20220270115Abstract: A learner generation unit generates, as a learner group, a plurality of learners that learned a correspondence of an attribute and an outcome in each of a plurality of learning data sets extracted from a data group associated with an attribute and an outcome of each of the targets. A target selection unit applies the learner group selected for inference to an inference data set and predicts, for each of the learners, an outcome corresponding to an attribute in the inference data set, calculates, for each attribute in the inference data set, at least one of an average of the outcomes predicted for each of the learners or an index value expressing an uncertainty of the outcomes, and selects, from the inference data set, the target to which the policy is to be executed based on at least one of the calculated average or the calculated index value.Type: ApplicationFiled: December 16, 2020Publication date: August 25, 2022Inventors: Kazuki YAMANE, Kazuaki TOKUNAGA, Kazuyuki OOTA, Hiroyuki NAMBA
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Publication number: 20220263448Abstract: There is provided a control device for an electric motor. The control device includes an inverter circuit and a control circuit. In a control cycle of the electric motor, the control cycle includes first to third sections. The control circuit outputs a first modulated wave in accordance with an output of the electric motor and outputs a minimum value or maximum value of a carrier wave as second and third modulated waves in the first section with a peak of first alternate-current voltage, and outputs the second modulated wave in accordance with an output of the electric motor and outputs the minimum value or maximum value of the carrier wave as the first and third modulated waves in the second section with a peak of second alternate-current voltage. The same output is applied in the third section with a peak of third alternate-current voltage.Type: ApplicationFiled: June 22, 2020Publication date: August 18, 2022Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuki YAMANE, Nobuaki YAMADA, Masamichi NAWA
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Patent number: 11327116Abstract: A pulse pattern generation device generating a pulse pattern for controlling switching elements provided in an inverter that operates a motor, the pulse pattern generation device includes a current calculation unit that calculates a current flowing through a coil when a voltage that is applied to the motor during the operation of the motor is virtually applied to the coil of the motor, an effective current calculation unit that calculates an effective current from the current calculated by the current calculation unit, an iron loss estimation unit that estimates an iron loss which originates in a core of the motor, and a pattern generation unit that generates a pulse pattern using an evaluation function including the iron loss estimated by the iron loss estimation unit and the effective current calculated by the effective current calculation unit as evaluation items.Type: GrantFiled: April 19, 2019Date of Patent: May 10, 2022Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuki Yamane, Masamichi Nawa
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Patent number: 11303224Abstract: An inverter device includes an inverter circuit that has switching elements configuring an upper arm and a lower arm of each of U, V, W-phases, a signal generator that generates signals having waveforms corresponding to signals of U, V, W-phase command voltages, a first calculation unit that calculates an effective line voltage, a second calculation unit that generates a modulation voltage every control period, and a comparison unit that compares the signals with signals of the modulation voltage every control period, and outputs signals having pulse patterns which operate the switching elements of the upper arm and the switching element of the lower arm in the inverter circuit.Type: GrantFiled: January 15, 2019Date of Patent: April 12, 2022Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuki Yamane, Masamichi Nawa
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Publication number: 20210239761Abstract: A pulse pattern generation device generating a pulse pattern for controlling switching elements provided in an inverter that operates a motor, the pulse pattern generation device includes a current calculation unit that calculates a current flowing through a coil when a voltage that is applied to the motor during the operation of the motor is virtually applied to the coil of the motor, an effective current calculation unit that calculates an effective current from the current calculated by the current calculation unit, an iron loss estimation unit that estimates an iron loss which originates in a core of the motor, and a pattern generation unit that generates a pulse pattern using an evaluation function including the iron loss estimated by the iron loss estimation unit and the effective current calculated by the effective current calculation unit as evaluation items.Type: ApplicationFiled: April 19, 2019Publication date: August 5, 2021Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuki YAMANE, Masamichi NAWA
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Publication number: 20200382021Abstract: An inverter device includes an inverter circuit that has switching elements configuring an upper arm and a lower arm of each of U, V, W-phases, a signal generator that generates signals having waveforms corresponding to signals of U, V, W-phase command voltages, a first calculation unit that calculates an effective line voltage, a second calculation unit that generates a modulation voltage every control period, and a comparison unit that compares the signals with signals of the modulation voltage every control period, and outputs signals having pulse patterns which operate the switching elements of the upper arm and the switching element of the lower arm in the inverter circuit.Type: ApplicationFiled: January 15, 2019Publication date: December 3, 2020Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuki YAMANE, Masamichi NAWA
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Patent number: 7840771Abstract: A method for storage management is provided which displays the materials on which it is determined which of the thin provisioning volume or the logical unit (LU) is to be used for storage promotion. The method is executed in a computer system having one or more host computers, one or more storage subsystems, and a management computer. The storage subsystem includes a physical disk and a disk controller. The disk controller provides the host computer with the thin provisioning volume. The management computer obtains the allocated capacity from the disk controller and the host-recognized capacity from the host computer. By subtracting the obtained allocated capacity from the host-recognized capacity, the management computer calculates an improved capacity. By dividing the calculated improved capacity by the obtained host-recognized capacity, the management computer calculates an improvement ratio and displays the calculated improvement ratio.Type: GrantFiled: February 27, 2009Date of Patent: November 23, 2010Assignee: Hitachi, LtdInventors: Kazuki Yamane, Takeshi Arisaka, Hiroyuki Tanaka
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Publication number: 20090172272Abstract: A method for storage management is provided which displays the materials on which it is determined which of the thin provisioning volume or the logical unit (LU) is to be used for storage promotion. The method is executed in a computer system having one or more host computers, one or more storage subsystems, and a management computer. The storage subsystem includes a physical disk and a disk controller. The disk controller provides the host computer with the thin provisioning volume. The management computer obtains the allocated capacity from the disk controller and the host-recognized capacity from the host computer. By subtracting the obtained allocated capacity from the host-recognized capacity, the management computer calculates an improved capacity. By dividing the calculated improved capacity by the obtained host-recognized capacity, the management computer calculates an improvement ratio and displays the calculated improvement ratio.Type: ApplicationFiled: February 27, 2009Publication date: July 2, 2009Inventors: Kazuki Yamane, Takeshi Arisaka, Hiroyuki Tanaka
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Patent number: 7519787Abstract: A method for storage management is provided which displays the materials on which it is determined which of the thin provisioning volume or the logical unit (LU) is to be used for storage promotion. The method is executed in a computer system having one or more host computers, one or more storage subsystems, and a management computer. The storage subsystem includes a physical disk and a disk controller. The disk controller provides the host computer with the thin provisioning volume. The management computer obtains the allocated capacity from the disk controller and the host-recognized capacity from the host computer. By subtracting the obtained allocated capacity from the host-recognized capacity, the management computer calculates an improved capacity. By dividing the calculated improved capacity by the obtained host-recognized capacity, the management computer calculates an improvement ratio and displays the calculated improvement ratio.Type: GrantFiled: July 19, 2006Date of Patent: April 14, 2009Assignee: Hitachi, Ltd.Inventors: Kazuki Yamane, Takeshi Arisaka, Hiroyuki Tanaka
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Publication number: 20070277017Abstract: A method for storage management is provided which displays the materials on which it is determined which of the thin provisioning volume or the logical unit (LU) is to be used for storage promotion. The method is executed in a computer system having one or more host computers, one or more storage subsystems, and a management computer. The storage subsystem includes a physical disk and a disk controller. The disk controller provides the host computer with the thin provisioning volume. The management computer obtains the allocated capacity from the disk controller and the host-recognized capacity from the host computer. By subtracting the obtained allocated capacity from the host-recognized capacity, the management computer calculates an improved capacity. By dividing the calculated improved capacity by the obtained host-recognized capacity, the management computer calculates an improvement ratio and displays the calculated improvement ratio.Type: ApplicationFiled: July 19, 2006Publication date: November 29, 2007Inventors: Kazuki Yamane, Takeshi Arisaka, Hiroyuki Tanaka